The Chiefs scored 14 fourth-quarter points to beat the Raiders, 21-9, at Frank Youell Field.

Middle linebacker Arch Matsos made his first appearance following illness and injury since early in the preseason.

Tackle Proverb Jacobs and guard Wayne Hawkins each injured a knee in the game. Neither player's prognosis had yet been determined.

Wide receiver Art Powell aggravated a pulled leg muscle and was held to two catches for 31 yards.

Prior to the game, the Raiders waived defensive end Jon Jelacic, who had suffered a groin muscle injury three days ago.

They activated defensive end Ben Davidson and defensive back Howie Williams off the taxi squad.